Answer:
Geiger counter is the correct answer.
Step-by-step explanation:
The intensity of a radioactive sample is commonly measured using a(n) Geiger counter.
A Geiger counter is also called a radiation detector, as it can measure the intensity of radiation.
Geiger counters are used to find out radioactive radiations, such as beta particles, alpha particles and gamma radiations.
Geiger counters consist of a inert gas filled tube and when it is hit by a high-energy particle electric current is produced.